Oil-spray gun and the like



Jan. 1, 1935. G. s. lsKY-AN 1,986,343

OIL SPRAY GUN AND THE LIKE Filed Jan. 23, 1934 Patented Jan. 1, 1935 s? PATENT- OFFICE oIL-sPRAY GUN AND THE LIKE George S.I Iskyan, Elmhurst; N. Y., assigner; to G. M. Co. Manufacturing Co. Inc., Long Island City, N. Y., a corporation of New York Application January 23, 1934, Serial 707,878

UNITED STATE My present invention relates to improvements suitable 'or desiredshape or size to deliver the in oil-spray guns and the like. oil from the gun.

An object of the invention is to make an oil- 10'is .a ball-valve in the passage 9; and 11 'is spray gun where there is gravity feed for the its seat; the ball when on the seat 11 sealing the 5 oil from the oil receptacle which may consist of passage, which it does on the return stroke of 5 the ordinary screw-top oil-can in which the oil the piston. 12 indicates not a seat but a mere is sold and which is arranged to be carried bodily stop for the ball allowing the oil to flow around by the gun. the ball and into the stem 8. In other words,`

Another object is to provide an oil-#spray gun when the ball is off the seat 11, which it is on l operable with one hand by closing and opening the forward stroke of the piston, there is clear- 10 the fist wherein the gun body, the oil-can reance and a free passage for the oil from the ceptacle and the operating piston and finger grips pistonr chamber into the oil delivery stem. In are so contrived and located relatively to the the illustrative device the Stop 12 C'OHSSS 0f the list that the gun is made easy to hold, aim and nOiChed end 0f the tube 8. l operate without tiring the hand. 14 is an upwardly open socket on the up-side of 15. The drawing shows one preferred form of gun `the cylinder for liquid tight engagement with the Within my invention which is to be taken as neck of an oil-can 15 and for supporting the can simply illustrative thereof, but not as limiting in inverted position thereon. Screw threads are the 'invention to said particular form. on the shown in the walls .of 'this socket for engaging contrary it will be understood that my herein with corresponding screw threads on the neck of invention may be embodied in avariety of forms the Oil-Can. This Socket iS Connected by a Valve coming within the 'spirit of the invention an controlled 'passage bearing the general designathe scope of the appended claims, v tion 16 leading from the inside of the socket 14,

In the drawing:- through the wall of the cylinder linto the piston Fig, 1 is a; side xelevation of gun and'attaehed chamber 2. 17 designates a ball valve and 18 is 25 can on a small scale; i its seat in this passageway. The part 19 belowA Fig.' 2 is an enlarged vertical section, partly the ball is not a seat but a stop which allows the in side elevation of the gun of Fig. 1, the can oil to flow from the can past the ball into the pisbeing shown only fragmentarily; and ton chamber. The forwardstrokeof the piston Fig, 3 is a, p1an view looking down on top of raises the ball against itsseat and seals the pas- 30 the gun in Fig. 2 with the can omitted, sageway, whereasthe return-stroke of the piston In the drawing, the cylinder 1 has a piston unseats the ball and allows it Vto drop against the chamber 2. This chamber contains a piston in- StOP 195 dicated as an entirety by the ynumeral 3, The .Grip means 20 and 21 are provided in connec- I 35. piston rod 4 projects through the rear end of the 121011 With the gun body fOr/She ngers 0f the Oper- 35 40 snug piston lit with the cylindrical wall of the cylinder and has a lmob or head`5 on its outer 'alof's hand Wllflll the gull ls grasped for Operation end suitable to be engaged by the palm of the by one hand with the palm against the head 5 ofm operators hand. Secured to the front end of the pistol; hsalgxnpd mfes com lmss an upper par oca e ea o e previous y rethe plston 1S the packing Washer 6 making a 'ferred to socket 14 and above the hollow stem 8 40 for engagement by the foreinger, which is indiplston chamber' 7 1s a compressw'n Sprmg lo cated dotted at A. The grip means further comcated between the piston and the front end of the piston chamber, said spring operatingv to elssafw part 21 local'ed .belo-W the hollow easement by the mlddle and reeiect the return or backward stroke of the piston mailling fingers indicated at B 45 alter 1l has been pushed forward manually and In the illustrative embodiment of the gun, the released' finger grip means consists of the upper and low- A hollow stem-8 pro-lects from the from end er portions designated 20 and 21 respectively, of 0f. the CYlllldel' Wlllll a Valve Controlled passage 9 a sufficiently rigid metal strap bearing the general between it and the piston chamber. In the Dardesignating numeral 22. This strap rests against 50 ticular form shown, this Stem consists 0f a tube the preferably flat front end of the cylinder 1 having screw threaded engagement at one end where it is apertured for the hollow stem 8 to pro'- with screwthreads at the end of the passage 9. ject througliit. The strap has its upper free-end This same tube is shown equipped at its free end 23 bent rearwardly so as to overlie the up-side of A with a cap or nozzle 8a having an orice of any the' cylinder which is preferably dat.

Also in the illustrative embodiment, the socket Y 14 takes the form of what is substantially an inverted oil-can cap which overlies the bent-over end 23 of the strap. A hole in the bottom of this cap registers with a hole through the strapand with the passage through the wall of the cylinder into the piston chamber' for the delivery of oil from the can to said chamber.

'24 is a headedv screw whose shank projects through said holes in the cap-bottom and the strap end engages screw threads in the passage through the cylinder-wall into the piston-chamber. When the screwV is in place, the cap-bottom and the strap and the intervening washers and packing elements 25, 26 and 27 are clamped by the head of the screw against the up-side of the cylinder so that the joints are tight and non-leaklngi -The headed screw is formedwith an axial bore which in effect constitutes in whole or in part the previously referred to passage 16 between the interior of the aforesaid socket or cap 14, the attached oil-can and the piston chamber of the cylinder. The previously described ball-valve 17 is contained in the aforesaid bore of the screw as are also the previously described seat 18 and the stop 19 for said valve.

The result ofthe combination of elements herein disclosed is an oil-spray gun having a gravity feedl for` the oil, which isahighly desirable and certain manner of feed from the oil-can or container inwhich the oil is marketed the gun being operable with one hand by the alternate closing andopening of the fist, the palmbeing against the head of the piston rod and the fingers at the .grips 20 and 21 straddling the oil delivery stem 8 ahead of the socket connection 14' between the oilican and the top of the gun, so that. the can is in the axis of the st and is adjacent the top of .the fist with the oil delivery stem 8 projecting between the fingers, all of which allows the gun to be directed and manipulated with maximum ease and control and with minimum tiring of the hand. Also the full power of the entire hand can be used on the forward stroke to throw forcibly a fine stream'of the oil into inaccessible and dis- -nejects the oil from the piston chamber out 4. through the stem and nozzle. Reversely each opening or relaxation of the 11st `permits vthe spring 'l to return the piston to its original position which reverses the position of the valves substantially sealing the piston chamberagainst the entrance of lair through the stem 8 and refilling the chamber with oil from the oil-can ready tn be ejected by the next forward stroke of the piston by the closing of the hand.

` To note a detail not before mentioned, it will be seen that the rear end of ,the metal block from which the cylinder 1 is made, is tapered at 28 so as to be reduced to a relatively thin lipped mouth 29 which is adapted to be peened or otherwise turned over to form an abutment 'for the rear end of the piston 3 without however, interfering withthe free reciprocation of the piston rod.

What I claim is:

-1. A manually operable oil-spray gun and the like, comprising, in combination, a cylinder and a hollow stem delivering from the front end of the cylinder, a piston in said cylinder on a piston rod extending through the rear end of the cylinderjan upwardly open cap on the up-side of the cylinder for liquid-tight engagement with the neck of an oil-can and for supporting the can in inverted position thereon, said cap having a hole through its bottom connecting with a passage through the cylinder-wall into the piston chamber, spring means impelling the piston and piston rod rearwardly, nger grip means consisting of a substantially rigid strap-like member at the front end of the cylinder with the hollow stem passing through a hole in the strap, said strap having a portion above the hollow stemserving as a grip for the forenger and having a portion below it serving as a grip for the middle and other fingers, the free upper end of said strap being bent rearwardly and located between the up-side of the cylinder and the bottom of the inverted cap and having a hole therethrough connecting with the hole in the bottom of the cap and with the passage to the piston chamber.

2. A manually operable oil-spray gun and the like, comprising, in combination, a cylinder and a hollow stem delivering from the front end of the cylinder, a piston in said cylinder on a piston rod extending through the rear end of the cylinder, an upwardly open cap on the'up-side of the cylinder for liquid-tight engagement with the neck, of an oil-can and for supporting the can in inverted position thereon, said cap having a hole through its bottom connecting with a passage through the cylinder-wall into the piston chamber, spring means impelling the piston and piston rod rearwardly, finger grip means consisting of a substantially rigid strap-like member at the front end of the cylinder with the hollow stem passing .through a hole in the strap, said strap having a portion above the hollow stem serving as a grip for the forenger and having a portion below it' serving as a grip for the middle and other fingers, the free upper end of said strap being bent rearwardly and located between the up-side of the cylinder and the bottom of the inverted cap and having a hole therethrough connecting with the hole in the bottom of the cap and with the passage to the piston chamber, and an axially bored securing member extending through said holes and into said passage wherein it is anchored and secures the cap-bottom and the strap and suitable intervening gaskets leaktight to the up-side of the cylinder, the bore of said securing member containing a suitable valve and valve seat whereby the interior of the cap and of any attached oil container is operatively connected with the piston chamber of the cylinder.

3. A manually operable oil-spray gun and the like, comprising, in combination, a cylinder and a hollow stem delivering from the front end of the cylinder with a valve controlled passage therebetween, said cylinder and stem constituting the body of thegun, a piston in said cylinder on a piston rod extending through the rear end. of the means impelling thepiston and piston rod rearwardly, and grip means in connection with said gun body for the ngers of the operators hand when the palm isagainst the outer end of the piston rod, said grip means comprising an upper part located ahead of the aforesaid socket and above the aforesaid hollow stem for engagement by the forefinger and also comprising a lower part below the hollow stem for engagement by the middle and other fingers.

4. A manually operable oil-spray gun and the like, comprising in combination, a cylinder and a hollow stem'delivering from the front end of the cylinder, said cylinder and stem constituting the body of the gun, a piston in said cylinder on a piston rod extending through the rear end of the cylinder, an upwardly open socket on the up-side of the cylinder for liquid-tight engagement with the neck of an oil-can and for supporting said can in inverted position thereon, said socket being connected by a passageway with the piston member of the cylinder, and grip means in connection with'said gun body for the fingers of the operators hand when the palm is against the outer end of the piston rod, said grip means comprising an upper part located ahead of the aforesaid socket and abovethe aforesaid hollow stem for engagement by the foreflnger and comprising a lower part below the hollow stem for engagement by the middle and other lingers, the wall at the rear end of the cylinder being reduced in thickness to a thin lipped mouth which lip extends radially inwardly forming a stop for the rear end of the piston without interfering with the reciprocation of the piston rod.

GEORGE S. ISKYAN. 

